defense secretary leon pa net making that announcement last week opening up thousands of front lines and potentially elite commando job opportunities to women in the military. our steve centanni is live with the news tonight in washington. steve, what is the argument against women serving in combat. >> well, people say it could lead to problems with unit cohesion and combat readiness, but with the stroke of a pen last week, as you mentioned, harris, outgoing panetta made it official, women can serve with men on the front lines. and some argue, there's a basic question of physical strength in combat situations. when women are put in those kind of demanding roles, they begin to break down. there's difference in the the physicality of women and men. they're not in the nfl. olympic athletes compete by gender. >> reporter: others claim women suffer more combat casuals and illnesses as men and pregnancy could be an issue as well, harris. >> harris: who are the supporters of women in combat? >> well, it's people like senator john mccain, a vietnam veteran himself and member of the ranking a